"As we've continued to focus and streamline our business, we've taken a close look at our operations to determine where winning is material to the long-term future of Groupon, as well as the investments required for success,” spokesman Bill Roberts said in an email. "Breadcrumb is a great product, and Point of Sale is an interesting space, but it's also very fragmented and highly competitive.”

Breadcrumb has about 50 employees following at least two staff reductions in the past year that cut its workforce in half, one as recently as March. Founder Seth Harris left the company in August, reports said.

Groupon cut 30 workers from its customer service team, mainly in Chicago, last week.

Upserve will integrate Breadcrumb's checkout software with its own tools, which allow restaurants to manage sales, loyalty and payments, the companies said in a news release. Breadcrumb's employees will join Upserve at its headquarters as well as in offices in San Francisco, Chicago and New York.

Together, the companies will serve 6,000 restaurants across the country.